Our general contractor is Specht GmbH, Bisdorf Fehmarn. They only build here. Nuances? I don’t know any offhand. It ventilates by itself anyway. In addition, the bedroom window is usually tilted open with us.
* Do not block windowsills * Floor-to-ceiling windows and pets (Where did the dog suddenly go?) * Cross-ventilation in strong winds can blow the papers off your desk * For sufficient effect, the exterior roller shutter should be raised -> additional roller shutter operations ... This is the case with manual window ventilation. With window rebate ventilators, however, a minimum level of ventilation is set. The exchange rate cannot really be measured, though. Other "disadvantages" would be: * Sound penetrates * Possibly water ingress if it rains heavily against the window. However, the water then runs inside along the frame and exits again through the drainage openings.
We have never had water. Wind is constant and does not bother, you get used to it, the cat always comes back, tilted window always works as well. All in all, no problems. So, dear [controlled residential ventilation] owners, get to the point. Extra charge? How often does it break? How much electricity? How does it clog the pipes? Do not be silent, oh brothers, speak, we want to hear.
So, dear controlled residential ventilation owners, let's get to the point. Extra cost? How often does it break? How much electricity? How filthy do the pipes get? Do not be silent, oh brothers, speak up, we want to hear.
Cost €2,400 for self-installation of decentralized controlled residential ventilation. Usage experience from central controlled residential ventilation: never broken, extra cost for a 300 sqm house €8,000. No filthy pipes. BUT: Also no permanent draft. Savings in heating costs easily offset the electricity costs. Good KFW rating with window rebate ventilation is difficult to impossible.
The KfW classification and the blower door test are done without the fans, and suddenly the little carpenter journeyman arrives and after 15 minutes they are inside.... nordanney, you can do the math. Your heating cost savings are set against electricity costs and the eight thousand for the purchase. What I see is the gain in comfort. We do have to ventilate sometimes to get rid of cooking fumes or the like; the controlled residential ventilation should also be able to do that. Our 99 euro extractor hood certainly doesn’t remove much. It is more of a design element.